Constant-voltage power supply unit

Details Constant-voltage power supply unit Constant-voltage power supply unit

2006-03-14

2006-03-14

Berhane, Adolf (Department: 2838)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Voltage regulator protective circuits

C323S277000

Reexamination Certificate

active

07012791

ABSTRACT:
A constant voltage supply unit having a high-speed load response, equipped with a fold-back type over-current protection function in which an output current detection voltage indicative of the output current is compared with the sum of a feedback voltage indicative of the output voltage and an offset voltage. The over-current protection function has a characteristic that the offset voltage is inversely proportional to the output-current detection voltage, so that the offset voltage is large when the output-current detection voltage (or the output current) is low, and decreases with the output-current detection voltage. In addition, the constant-voltage power supply unit allows enhance feedback of ac components in the feedback loop so as to enhance the ESR of the load-side capacitor, thereby securing phase compensation to prevent oscillations in the feedback loop.

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